DESCRIPTION

lvmpolld is polling daemon for LVM. The daemon receives requests for polling of already
initialised operations originating in LVM2 command line tool. The requests for polling
originate in the lvconvert, pvmove, lvchange or vgchange LVM2 commands.
The purpose of lvmpolld is to reduce the number of spawned background processes per
otherwise unique polling operation. There should be only one. It also eliminates the
possibility of unsolicited termination of background process by external factors.
lvmpolld is used by LVM only if it is enabled in lvm.conf(5) by specifying the
global/use_lvmpolld setting. If this is not defined in the LVM configuration explicitly
then default setting is used instead (see the output of lvmconfig--typedefaultglobal/use_lvmpolld command).

OPTIONS

To run the daemon in a test environment both the pidfile_path and the socket_path should
be changed from the defaults.
-f, --foreground
Don't fork, but run in the foreground.
-h, --help
Show help information.
-l, --log {all|wire|debug}
Select the type of log messages to generate. Messages are logged by syslog.
Additionally, when -f is given they are also sent to standard error. There are two
classes of messages: wire and debug. Selecting 'all' supplies both and is
equivalent to a comma-separated list -l wire,debug.
-p, --pidfilepidfile_path
Path to the pidfile. This overrides both the built-in default (/run/lvmpolld.pid)
and the environment variable LVM_LVMPOLLD_PIDFILE. This file is used to prevent
more than one instance of the daemon running simultaneously.
-s, --socketsocket_path
Path to the socket file. This overrides both the built-in default
(/run/lvm/lvmpolld.socket) and the environment variable LVM_LVMPOLLD_SOCKET.
-t, --timeouttimeout_value
The daemon may shutdown after being idle for the given time (in seconds). When the
option is omitted or the value given is zero the daemon never shutdowns on idle.
-B, --binarylvm_binary_path
Optional path to alternative LVM binary (default: /lvm). Use for testing purposes
only.
-V, --version
Display the version of lvmpolld daemon.
--dump Contact the running lvmpolld daemon to obtain the complete state and print it out
in a raw format.

ENVIRONMENTVARIABLES

LVM_LVMPOLLD_PIDFILE
Path for the pid file.
LVM_LVMPOLLD_SOCKET
Path for the socket file.